Romney wins Ariz. and Mich. on economy, experience (AP)

[the doctor]

AP - Mitt Romney played to his strengths in Arizona and Michigan, carrying economy voters and those seeking the most electable candidate, according to exit polls conducted for The Associated Press in both states. Romney was able to expand beyond those reliable bases, which have backed him in each state with an exit poll except for South Carolina, and also capture voters focused on a candidate's experience or concerned about the deficit.

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